Wash. Rev. Code § 47.80.026
Each regional transportation planning organization, with cooperation from component cities, towns, and counties, shall establish guidelines and principles by July 1, 1995, that provide specific direction for the development and evaluation of the transportation elements of comprehensive plans, where such plans exist, and to assure that state, regional, and local goals for the development of transportation systems are met. These guidelines and principles shall address at a minimum the relationship between transportation systems and the following factors: Concentration of economic activity, residential density, development corridors and urban design that, where appropriate, supports high capacity transit, freight transportation and port access, development patterns that promote pedestrian and nonmotorized transportation, circulation systems, access to regional systems, effective and efficient highway systems, the ability of transportation facilities and programs to retain existing and attract new jobs and private investment and to accommodate growth in demand, transportation demand management, joint and mixed-use developments, present and future railroad right-of-way corridor utilization, and intermodal connections.
Examples shall be published by the organization to assist local governments in interpreting and explaining the requirements of this section.
RCW 47.80.026